Blindstitch sewing-machine.



No. 721,081. PATENTBD PEB. 17, 1903.

- L. ONDBRDONK.

BLINDS'TITCH SEWING MACHINE.

AP`1 LIOATION FILED 111:0. zz, 1899.

N0 MODEL.

3 SHEETS-SHEET 1 -PATENTE'D FEB. 17, 1903.

L. IONDERDONK. BLINDSTITGH SEWING MACHINE.

PPLIOATION FILED DEO. 22', 1899.

N0 MODEL.

3,SHEETS-SHEET 2.

110.721,031. f PATENTBD 1312.17, 1903.

' L. ONDERDONK.

BLINDSTITCH SEWING MACHINE.

APPLIGATION FILED DBO. 22, 1899. N0 MODELr 3 SHEETSfSHBET 3.

wtnooea Y l l I v ,l 33%" um v nz noms Pirrsns co., wow-uvam wnsmmrroun. c.

UNITED STATES:

PATENT OFFICE.

LANSING ONDERDONK, OF NEW YORK, N. Y., ASSIGNOR TO TIIE UNION SPECIALSEWING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILLINOIS.

BLINDSTITCH SEWING-MACHINE.

SPECIFICATION formingpart of Letters rI ateri. No. 721,081, datedFebruary 17, 1903.

Application filed December 22. 1899. Serial No. 741,228. (No model.)

To all whom if may concern:

Be it known that I, LANSING. ONDERDONK, a citizen of the United States,residing at New York, in the county of New York, State of New York, haveinvented certain. new and useful Improvements in Blindstitch Sewing-Machines, of which the following is a description, reference being hadto the accompanying drawings and to the letters and figures of referencemarked thereon.

My invention relates to an improvement in sewing machines; and theimprovements forming the subject-matter of this application areespecially applicable to sewing-machines of the blindstitch type inwhich the goods are crimped on the work-plate, and a needle, horizontal,or substantially so, arranged above the bed-plate, coperates with alooper, also arranged above the bed-plate,

to form stitches.

The present invention relates to various details applicable to suchmachines, including such features as the work-plate adapted to bedepressed to allow of the insertion or removal' of the material and tohave a limited yielding movement under the action of varying thicknessesof goods, so that the needle will always get the proper bite into thegoods.

rIt also includes other featuressuch as the throat-plate, presser-foot,&c.-all as hereinafter described,and referred toin the appended claims.

The invention is illustrated in the accompanying drawings, in which-Figure l is a front side elevation, partly in section, of asewing-machine embodying my invention. Fig. 2 is Va detail view of thespring which allows the bed-plate to yield downwardly. Fig. 22L is anend view of a machine embodying the invention, part being broken away.Fig-2l is a view similar to Fig. 2a to show more clearly the relation ofthe presser-foot and work-plate, the position of the parts when thework-plate is lowered and the presser-foot is lowered being shown indotted lines. Fig. 3 is a perspective view of the presser-foot detached.Fig. is a top plan view of the same. Fig. 5 is a sectional view of thesame. Fig. 6 is a plan view of the throat-plate, and Fig. 7 is an endview thereof. Fig. 8 is a detail view of the mechanism forraising andlowering the looper-bar.

In the drawings,.A is the machine frame or standard; B, the cylindricalbed-plate; C, the gooseneck; D, the presser-foot; E, the throat-plate,beveled and provided with the ridge ot, over which the material to besewed is crimped.

F is the needle-lever, pivoted to the head of the machine at b, operatedby the pitman connection c from the wheel d, mounted on the main shaft.This needle-lever F carries at its lower end the curved needle e, whichmoves in a substantially horizontal plane back and vforth across theline of the seam, engaging the crimped portion of the goods.

G is the looper-bar, carrying on its. lower end the looper f, which mayor may not carry a thread. f This looper-bar G is inclined from theperpendicular and has bearings in lugs on the machine-frame. Thislooper-bar is oscillated to cause the looper to cooperate with Vtheneedle to form stitches.

The mechanism for oscillating the looper ba-r or shaft includes thepitman H, operated from the belt-wheel I, this pitman having aball-joint connection with the arm g on the sleeve h, pivoted on thestud t', secured to the head'of the machine. A second arm k, projectingfrom the sleeve, pivotally embraces a forked stud Z, between the forksof which is pivoted the part m, having a head embracing a ball-stud n onlthe angle-lever or crank o, rigidly clamped at one end to thelooper-bar G. As the driving-shaft rotates, therefore, the looper-bar Goscillates to impart the proper movement to the looper. By arranging thelooper on an inclined shaft and giving it the oscillation referred to itwill cooperate with the needle to form stitches, taking the needleloopat one point and then carrying its own Athread (if a double-chain-stitchlooper) or the needle-thread (if a si'ngle-chain-stitch 1ooper)intoposition to allow the needle to pass through it. It is desirable,however, to give to the looper a bodily vertical movement as itV ispassing from one position to the otherin order to lift it over seams orother obstructions, and the mechanism for lifting the looper-bar isshown in detail in Fig.8 and is the same as that IOO claimed in myapplication filed of even date herewith, Serial No. 741,229. Theangle-lever or crank o is formed with a socket to receive the ball p onthe upper end of the rod K, which at its lower end has a ball q fittingin a socket r in the part L, secured to the head of the machine. It willbe seen, therefore, that as the arm or rod K by reason of the movementof the angle-lever o gyrates on its pivot q 7 it will force the saidangle-lever or crank 0 up and down, thus raising and lowering thelooper-bar G, the ball and other pivotal connections between theangle-lever o and the pitman H preventing any bind.

As herein shown, the work-support B is a cylindrical casing in which iscontained the feed-operating mechanism, and at its rear end itisprovided with a cylindrical lug 1, through which passes the pin 2,journaled in the standard A. Projecting upwardly from the rear portionof the bed-plate isa part 3, beveled at its upper end, as shown at 4. Bymeans of the hinge 2 the bed-plate has a limited movement up and down toallow of the removal and insertion ot' the work, and it is held in itsraised position by the means shown, and its free end extendshorizontally beneath the stitch-forming mechanism and over this free endtubular work-such as trousers-legs, coat-sleeves, dsemay be placed andsewed. It is desirable in a machine of this kind to provide meanswhereby the bed-plate may accommodate itself to varying thicknesses ofgoods in order that the needle may get the proper bite into the materialto be sewed. Where the presser-foot is the yielding part and thebed-plate does not yield at all under an extra thickness of goods, thepresser-foot rises so far that the needle will take too much of the bodyof the goods, and therefore I have provided au arrangement forgiving alimited yielding movement to the bed-plate. This is accomplished in thefollowing manner: 5 represents a barrel or sleeve having theopposite-extending projections 6 and 7 rigidly fixed to short rockshaftsS, journaled in lugs on the machinestandard, a handle 9 serving tomanipulate the shafts and the barrel. Passing through this barrel is aspring-plunger l0, carrying on its inner end a heniispherical part 11,adapted to engage with the beveled part 4 of the projection 3. Thespring 12 normally keeps the plunger in engagement with the plate 3, anda screw 13, bearing on the spring and threaded into the projection 14 onthe barrel, regulates the tension of said spring. By this arrangementwhen the hand-lever 9 is forced to upright position it causes thehemispherical part l1 to bear firmly against the part 4 of the plate 3and hold the bed-plate in its raised position. To allow of a limitedspringyielding movement,however,to the bed-plate, the plunger 10,adjacent the head 11, has a reduced portion 15, into which projects theinner end of the screw 16, so that under sufcient pressure from abovethe plunger is capable of a sliding movement in the barrel, this slidingmovement being limited by the size of the reduced portion 15. Thepresserbar has an adjustable collar 19 secured to it that may be set toallow the presser-foot to rise to a limited height. The presser-spring2O is made lighter than that of the cylinder, so that the presser-footmoves up and down first within a fixed limit according to the varyingthickness of the work. When the work is thicker than can be accommodatedwithin the limit of the rise and fall of the presser-foot, then thecylinder yields suiiciently to meet the requirements of the Work passingthrough, for the adjustable collar on the presser-bar coming in contactwith the lug through which the presser-bar has its bearingis stoppedfrom rising farther,and then the cylinder yields downwardly. In otherwords, the presser-foot yields first to a desired extent, after whichthe cylinder yields a suiiicient amount to let the work pass through. Bylimiting the rise of the presser-foot the bite of the needle iscorrespondingly limited, as the limit in said rise of the presser-footmay not be sufficient to let seams of heavy thickness of work passbeneath it, and the yielding of the cylinder to accommodate the samebecomes necessary. It will thus loe seen that although the actual pathof movement of the needle remains the same the distance below the top ofthe goods of the lowest part of the stitch depends upon the extent towhich the presser-foot is raised, and this depends on the thickness ofthe goods and the adjustment of the collar 19.

The yielding of the cylinder after the presser-foot has ceased to riseallows greater thickness of goods to be sewed than could otherwise beaccommodated. e

At its forward end the work-support or bedplate B is elevated slightlyand provided on either side with the V-shaped projecting portions, uponwhich is secured the throat-plate E of the shape shown in Figs. 6 and 7.This throat-plate has the raised V-shaped ridge a, the apex of the ridgecoming substantially beneath the needle and over which the goods will becrimped to enable the needle to take the proper bite therein,enteringand emerging on the same side of the fabric.

The presser-foot (marked D) is shown in Figs. 3, 4, and 5 and is cutout, as shown at 17, to allow of the apex of the ridge on thethroat-plate fitting closely thereunder and also has the transversegroove 18, forming a passage for the needle. It is hollowed out, asshown in Fig. 5,to fit snugly over the throatplate and is secured at itsrear end to the presser-bar in any suitable way.

Various minor modifications and changes in the construction of themachine may be made without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

IOO

IIO

1. In a sewing-machine having suitable stitch-forming mechanismincluding a needle reciprocating from side to side of the line of seam,and a looper cooperating therewith to form stitches, an overhangingframe carrying the stitch-forming mechanism, a yielding work-supportingarm pivoted to the machinestandard and having a free end extendinghorizontally beneath the stitch-forming mechanism; substantially asdescribed.

2. In a blindstitch sewing machine, the combination with suitable stitchforming mechanism includinga needle, apresser-foot, a yieldingWork-support, a ridge-forming rib movable therewith and engaging thework beneath the presser-foot and over which ridgeforming rib said workis fed, said presser-foot being formed on its under surface to fit saidridge-forming rib; substantially as described.

3. In a sewingmachine having suitable stitch-forming mechanismincludingr a needle reciprocating from side to side of the line of theseam, and a looper cooperating therewith to form stitches, anoverhanging frame supporting looper and needle operating mechanisms, awork-support, means for crimping the goods, comprising a presser-footcarried by the 'overhanging frame and cut out on its under side, aridge-forming rib on the work-support, adapted to tit the cut-outportion of the presser-foot, whereby the goods are crimped, suchridge-forming rib being yieldingly supported; substantially asdescribed.

4. In a sewing-machine having suitable stitch-forming mechanismincluding a needle reciprocating from side to side of the line of theseam, and a looper cooperating therewith to form stitches, anoverhanging frame supporting the looper and needle operating mechanisms,a yielding work-support, meansfor crimping the goods, comprising apresser-foot carried by the overhanging frame and cut out on its underside, and a ridge-forming rib on the work-support adapted to fit thecut-out portion of the presser-foot, whereby the goods are crimped;substantially as described.

5. In a sewingmachine having suitable stitch-forming mechanism includinganeedle reciprocating from side to side of the line of seam, and alooper cooperating therewith to form stitches, a work-supportingcylinder arranged below th e needle and looper, and pivoted upon an axistransverse to the machineframe, whereby it may be raised and lowered,and means for holding it in its raised position, said means including aspring device for permitting yielding movement of the cylinder;substantially as described.

6. In a sewingmachine having suitable stitch-forming mechanism,includinga needle reciprocating from side to side of the line of seam,and a looper cooperating therewith to form stitches, an overhangingframe supporting the needle and looper, a Work-support arranged belowthe needle and looper, and pivoted upon an axis transverse to themachineframe, whereby it may be raised and lowered,

reciprocating from side to side of the line of y seam, and a loopercooperating therewith to form stitches, an overhanging frame supportingthe looper and needle operating mechanisms, a horizontal work-supportpivoted to the standard and extending parallel with the overhangingframe, means for crimping the goods in which the stitches are formed, anelement of said crimping means being carried on the work-support;substantially as described.

8. In a sewingmachine having suitable stitch-forming mechanismincludinga needle reciprocating from side to side of the line of seam,and a looper cooperating therewith to form stitches, both said needleand looper being arranged above the work-support carried upon anoverhanging frame, and a yielding horizontal work-support pivoted to thesewing-machine standard below said needle and looper, a device forholding said support in raised position and means for releasing saiddevice to allow said support to fall, forinsertion or removal of thework; substantially as described.

9. In a sewing-machine having suitable stitch-forming mechanismincluding a reciprocating needle, and a looper cooperating therewith toform stitches, a horizontal worksupport pivoted to the sewing-machinestandard and below the needle and looper, and means for clamping thework-support vin operative position and comprising a yielding portionwhereby under an increased thickness of goods, the work-plate may yield;substantially as described.

10. In a sewing-machine having suitable stitch-forming mechanism, awork-support pivoted to the machine frame, means for clamping thework-support in position, including 'a spring plunger having limitedmovement to allow the work-support to yield; substantially as described.

1l. In a sewing-machine having suitable stitch-forming mechanism, awork-support pivoted to the machine-frame, a swinging clamp engaging thework-support to keep it normally elevated, said clamp including ayielding spring-pressed plunger bearing on said work support;substantially as described.

l2.` In combination with the bed-plate or work-support hinged to themachine-frame, and having the upward projection as 3, the barrel orcasing with means for swinging it, and a spring-pressed plunger in saidbarrel or casing adapted to bear against the part 3 and means forlimiting its movement; substantially as described.

13. In a sewing -machine having stitchforming mechanism,including areciprocating Ico needle, and a looper cooperating therewith to formstitches, said looper and needle vibrating from side to side of the lineof seam, a work-supporting member havinga rib or ridge over which thematerial to be sewed is crimped, a presser-foot complemental thereto,cut away to receive the crimped portion of the goods and having atransverse guidinggroove iu which the needle travels; substantially asdescribed.

14. In a sewingmachine having stitchfol'ming mechanism, including areciprocating needle, and a looper cooperating therewith to formstitches, said looper and needle Vibrating from side to side of thecentral line of the seam, a pivoted work-supporting member having a ribor ridge over which the material to be sewed is crimped, a presser-footcomplemental thereto, cutaway to permit the goods to be raised upintothe plane of movement of the needle; substantially as described.

15. In a sewingmachine having stitchforming mechanism including a needlea1'- ranged above the work-support and reciprocating in a substantiallyhorizontal plane a looper also arranged above the work-support andcooperating with said needle to form stitches, a throat-plate on thework-support having a raised portion over which the material is crimped,a presser-foot complemental to the throat-plate and having means forguiding the needle in its reciprocations; substantially as described.

16. In a sewingmachine having stitchforming mechanism, including aneedle arranged above the work-support, and reciprocating in asubstantially horizontal plane, a looper also arranged above thework-support and cooperating with said needle to form stitches, abeveled throat-plate on the worksupport having a raised portion taperingt0 an apex beneath the needle, a presser-foot formed to tit over thethroat-plate and having a slot to guide the needle, and a longitudinalslot extending from said guiding-slot; substantially as described.

17. In a sewing machine having stitchforming mechanism, includinganeedle reciprocating in a substantially horizontal plane, l

and a looper cooperating therewith to form stitches, a pivoledwork-support having a yielding movement, a presser-foot alsohavingayielding movement, and adapted to yield more readily than thework-support, means for limiting the movement of the presserfoot, saidneedle and looper being arranged above the work-support; substantiallyas described.

18. A sewing-machine having a pivoted yielding work-support,with meansthereon for crimping the goods to be sewed, and apresserfoot cooperatingtherewith, said presser-foot being spring-pressed downwardly by a weakerspring than that which presses the work-support' upwardly and havingmeans for limit- Aing its movement; substantially as described.

19. In a blindstitch sewing-machine, the combination with suitablestitch forming mechanism including a needle, avpresser-foot, aWork-support pivoted to allow of the insertion and removal of the work,said work-support having also a yielding movement, a ridge-forming ribmovable therewith carried on the outer upper end thereof and engagingthe work beneath the presser-foot and over which ridge-forming rib saidwork is fed, said presser-foot being formed on its under surface to fitsaid ridge-forming rib; substantially as described.

20. In 1a blindstitch sewing-machine, the combination with suitablestitch forming mechanism including a needle, an upper spring-pressingdevice, a pivoted-worksup port, a ridge-forming rib over which the workis fed, with means for yieldingly supporting it, said upperspring-pressing device being formed on its under surface to receive theridge-forming rib; substantially as described.

2l. In a sewing-machine having suitable stitch-forming mechanismincluding a needle reciprocating from side to side of the line of theseam, and a looper cooperating therewith to form stitches, anoverhanging frame supporting the looper and needle operating mechanisms,a Work-support pivoted at one end to the standard, means for crimpingthe goods comprising a presser-foot carried by the overhanging frame andcut out on its under side, a ridge-forming rib carried on the outerupper end of the work-support adapted to lit 4the cut-out portion of thepresser-foot, whereby the goods are crimped, said ridge-forming ribbeing yieldingly supported; substantially as described.

22. In a sewing-machine having suitable stitch-forming mechanismincluding a needle reciprocating from side to side of the line of theseam, and a looper cooperating therewith to form stitches, anoverhanging frame supporting the looperand needle operating mechanisms,a yielding work-support pivoted at one end to the standard, means forcrimping the goods, comprising a presser-foot carried by the overhangingframe and cut out on its under side and a ridge-forming rib carried onthe outer upper end of the work-support adapted to fit the cut outportion of the presser-foot, whereby the goods are crimped;substantially as described.

In testimony whereof I ax my signature in presence of two witnesses.

- LANSING ONDERDONK.

Witnesses:

F. A. NORTH,

J. H. HOWELL.

IIO

